Your issue is caused by the fact that the native TextBox
control does not support formatting-related editing commands like these defined in the EditingCommands
class. In order to use these commands you can try to replace the TextBox
with a RichTextBox
. For more information about the supported commands you can read this article
. Please take a look at the attached project and let me know if it solves your issue.
Pavel R. Pavlov
the Telerik team